LM293DMR2 Equivalent & Substitute Parts

Part Overview

The LM293DMR2 is a dual general-purpose comparator IC manufactured by onsemi, housed in an 8-MSOP surface-mount package. This device features open-collector and open-drain outputs with rail-to-rail capability, operating across a wide supply voltage range of 2V to 36V (single supply) or ±1V to 18V (dual supply). The part is currently classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production support.

Key Parameters

Parameter	Value
Manufacturer Part Number	LM293DMR2
Manufacturer	onsemi
Type	General Purpose Comparator
Number of Elements	2
Output Type	Open-Collector, Open-Drain, Rail-to-Rail
Voltage Supply (Single/Dual)	2V ~ 36V / ±1V ~ 18V
Voltage - Input Offset (Max)	5mV @ 30V
Current - Input Bias (Max)	0.25µA @ 5V
Current - Output (Typ)	16mA @ 5V
Current - Quiescent (Max)	2.5mA
Operating Temperature	-25°C ~ 85°C
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Mounting Type	Surface Mount
RoHS Status	RoHS non-compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the LM293DMR2 is determined by the following critical parameters:

Electrical Compatibility Requirements:

Dual comparator configuration (2 elements)
Output type: Open-Collector, Open-Drain, or Rail-to-Rail capability
Supply voltage range: 2V ~ 36V (single) or ±1V ~ 18V (dual)
Input offset voltage: ≤ 5mV @ 30V
Input bias current: ≤ 0.25µA @ 5V
Output current capability: ≥ 16mA @ 5V
Quiescent current: ≤ 2.5mA
Operating temperature: minimum -25°C, maximum 85°C

Package Compatibility:

Surface-mount 8-pin packages (MSOP, VSSOP, SOIC, MiniSO, UFSON acceptable)
Pin-compatible or functionally equivalent pinout

Compliance Considerations:

Direct substitutes maintain identical electrical specifications and package footprint
Similar substitutes meet electrical requirements but may have different package dimensions or enhanced specifications (wider temperature range, automotive qualification)

Parameter Comparison

Part Number	Manufacturer	Product Status	Output Type	Supply Voltage	Input Offset (Max)	Input Bias (Max)	Output Current (Typ)	Quiescent Current (Max)	Operating Temp	Package	RoHS Status
LM293DMR2	onsemi	Obsolete	Open-Collector, Open-Drain, Rail-to-Rail	2V~36V / ±1V~18V	5mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	-25°C ~ 85°C	8-MSOP	Non-compliant
LM293DMR2G	onsemi	Active	Open-Collector, Open-Drain, Rail-to-Rail	2V~36V / ±1V~18V	5mV @ 30V	0.25µA @ 5V	16mA @ 5V	2.5mA	-25°C ~ 85°C	8-MSOP	ROHS3 Compliant
LM2903YST	STMicroelectronics	Active	Open-Collector, Rail-to-Rail	2V~36V / ±1V~18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	2.5mA	-40°C ~ 125°C	8-MiniSO	ROHS3 Compliant
LM293DGKR	Texas Instruments	Active	Open-Collector, Open-Drain, Rail-to-Rail	2V~36V / ±1V~18V	5mV @ 30V	0.25µA @ 5V	20mA	2.5mA	-25°C ~ 85°C	8-VSSOP	ROHS3 Compliant
AP393ASG-13	Diodes Incorporated	Active	CMOS, DTL, ECL, MOS, Open-Collector, TTL	2V~36V / ±1V~18V	8mV @ 5V	0.4µA @ 5V	16mA @ 5V	2.5mA	0°C ~ 70°C	8-SOP	ROHS3 Compliant
AP393SG-13	Diodes Incorporated	Active	Open-Collector	2V~36V / ±1V~18V	5mV @ 5V	0.25µA @ 5V	16mA	2.5mA	0°C ~ 70°C	8-SOP	ROHS3 Compliant
BA2903SFVM-TR	Rohm Semiconductor	Active	Open-Collector	2V~36V / ±1V~18V	7mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40°C ~ 105°C	8-MSOP	ROHS3 Compliant
BA2903YFVM-CTR	Rohm Semiconductor	Active	Open-Collector	2V~36V / ±1V~18V	4mV @ 5V	0.25µA @ 5V	16mA @ 5V	1mA	-40°C ~ 125°C	8-MSOP	ROHS3 Compliant
LM193H/NOPB	Texas Instruments	Active	Open-Collector, Rail-to-Rail	2V~36V / ±1V~18V	5mV @ 30V	0.1µA @ 5V	16mA @ 5V	2.5mA	-55°C ~ 125°C	TO-99-8	ROHS3 Compliant
LM193QT	STMicroelectronics	Active	Open-Collector, Rail-to-Rail	2V~36V / ±1V~18V	—	—	—	2.5mA	—	8-UFSON (2x2)	ROHS3 Compliant
LM2903AVQDRG4Q1	Texas Instruments	Active	Open-Collector, Rail-to-Rail	2V~36V / ±1V~18V	2mV @ 5V	0.25µA @ 5V	20mA	2.5mA	-40°C ~ 125°C	8-SOIC	ROHS3 Compliant

Engineering Selection Recommendations

Direct Substitutes (Identical Electrical & Package Specifications):

LM293DMR2G is the primary direct substitute. It maintains identical electrical parameters and 8-MSOP package footprint as the obsolete LM293DMR2, with the critical advantage of active product status and ROHS3 compliance. This part is recommended as the first choice for direct replacement in existing designs.

Functionally Equivalent Substitutes (Matching Electrical Performance, Different Packages):

LM293DGKR (Texas Instruments, 8-VSSOP) and LM2903AVQDRG4Q1 (Texas Instruments, 8-SOIC) meet all electrical requirements with enhanced output current capability (20mA vs. 16mA). Both are active, ROHS3-compliant, and suitable for designs where package footprint can be adapted. LM2903AVQDRG4Q1 includes automotive qualification (AEC-Q100) and extended temperature range (-40°C to 125°C).

Alternative Substitutes (Comparable Performance, Extended Temperature Range):

BA2903SFVM-TR and BA2903YFVM-CTR (Rohm Semiconductor, 8-MSOP) provide package compatibility with the original LM293DMR2. BA2903YFVM-CTR offers superior input offset voltage (4mV) and automotive qualification (AEC-Q100) with extended temperature range (-40°C to 125°C). Both feature reduced quiescent current (1mA vs. 2.5mA).

LM2903YST (STMicroelectronics, 8-MiniSO) and LM193QT (STMicroelectronics, 8-UFSON) provide active alternatives with extended temperature ranges and automotive qualification where applicable. These require PCB layout adaptation due to different package geometries.

Limited Compatibility Substitutes:

AP393ASG-13 and AP393SG-13 (Diodes Incorporated, 8-SOP) meet electrical requirements but operate within a narrower temperature range (0°C to 70°C), making them unsuitable for applications requiring the original -25°C to 85°C specification. AP393ASG-13 exhibits higher input bias current (0.4µA vs. 0.25µA).

LM193H/NOPB (Texas Instruments, TO-99-8) is a through-hole package alternative suitable only for designs permitting mechanical package conversion. It provides extended temperature range (-55°C to 125°C) and lower input bias current (0.1µA).

Frequently Asked Questions (FAQ)

Q: Can LM293DMR2G be used as a direct replacement for LM293DMR2?

A: Yes. LM293DMR2G is electrically and mechanically identical to LM293DMR2, with the same 8-MSOP package footprint and electrical specifications. The primary difference is product status (active vs. obsolete) and RoHS compliance (ROHS3 vs. non-compliant). No design changes are required.

Q: What is the difference between LM293DGKR and LM293DMR2?

A: LM293DGKR (Texas Instruments, 8-VSSOP) matches all electrical specifications of LM293DMR2 but uses a different surface-mount package. The VSSOP package is slightly smaller than MSOP. Output current is rated at 20mA typical versus 16mA for the original. PCB layout modification is required for package conversion.

Q: Are the Rohm BA2903 series parts compatible with LM293DMR2?

A: BA2903SFVM-TR and BA2903YFVM-CTR are electrically compatible and use the same 8-MSOP package. Both are active products with ROHS3 compliance. BA2903YFVM-CTR offers superior specifications (4mV input offset, 1mA quiescent current) and automotive qualification. No PCB changes are needed for these substitutes.

Q: Why do some substitutes have different operating temperature ranges?

A: Operating temperature range is a specified parameter that varies by manufacturer and product grade. The original LM293DMR2 operates -25°C to 85°C. Substitutes with extended ranges (e.g., -40°C to 125°C) are suitable for applications requiring wider temperature operation. Substitutes with narrower ranges (e.g., 0°C to 70°C) are not recommended if the original temperature specification must be maintained.

Q: Can I use LM193H/NOPB as a substitute?

A: LM193H/NOPB is electrically compatible but uses a through-hole TO-99-8 package instead of surface-mount. This requires significant PCB redesign and is only practical if the application permits mechanical package conversion. It is not recommended for direct substitution in existing surface-mount designs.

Q: What does "automotive qualification (AEC-Q100)" mean?

A: AEC-Q100 is an automotive industry standard qualification that certifies components for use in automotive applications. Parts with this qualification (such as LM2903AVQDRG4Q1 and BA2903YFVM-CTR) have undergone additional reliability testing and are suitable for automotive-grade designs. Non-qualified parts may not meet automotive reliability requirements.

Q: Are there package compatibility issues between MSOP, VSSOP, and SOIC?

A: Yes. MSOP, VSSOP, and SOIC are different surface-mount package types with different footprints and pin spacing. Direct PCB substitution is not possible without layout modification. However, all three packages are 8-pin configurations with compatible pinouts for this comparator family, allowing functional substitution with PCB redesign.

Q: Which substitute offers the best overall compatibility?

A: LM293DMR2G offers the best compatibility as a direct substitute—identical package (8-MSOP), identical electrical specifications, and active product status with ROHS3 compliance. No design changes are required. For applications requiring extended temperature range or automotive qualification, LM2903AVQDRG4Q1 or BA2903YFVM-CTR are recommended alternatives.

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